class CFPropertyList::CFDate

def initialize(value = nil,format=CFDate::TIMESTAMP_UNIX)
  if(value.is_a?(Time) || value.nil?) then
    @value = value.nil? ? Time.now : value
  elsif value.instance_of? Date
    @value = Time.utc(value.year, value.month, value.day, 0, 0, 0)
  elsif value.instance_of? DateTime
    @value = value.to_time.utc
  else
    set_value(value,format)
  end
end